<template>
  <nav-bar>
    <div slot="left" class="back" @click="backtolast">
      <img src="@/assets/img/common/goback.jpg" alt="" />
    </div>
    <div slot="center" class="title">
      <div v-for="(item,index) in title"
           class="title-item"
           @click="itemclick(index)"
           :key="index" :class="{active : index===currentIndex}">
        {{item}}
      </div>
    </div>
  </nav-bar>
</template>

<script>
  import NavBar from "../../../components/common/navbar/NavBar";
  export default {
    name: "DetailNavBar",
    components:{
      NavBar
    },
    data() {
      return{
        title:['商品','参数','评论','推荐'],
        currentIndex: 0
      }
    },
    methods: {
      itemclick(index) {
        this.currentIndex = index
        this.$emit('titleClick',index)
      },
      backtolast(){
        this.$router.go(-1)
      }
    }
  }
</script>

<style scoped>
  .back img{
    width: 44px;
    height: 44px;
  }
  .title{
    display: flex;
    font-size: 15px;

  }
  .title-item{
    flex: 1;
  }
  .active{
    color: var(--color-high-text);
  }
</style>
